Hello!
I would like to build a kitchen scale, kind of...
I have some requirements:
It should able to measure from as low 100g and up to 10kg.
It should be able to connect to wifi.
It should host a service and allowing access though a Rest-API.
It should host a website.
It will have a power outlet, so no battery.
The construction need to be stable so I could weigh bulk things correct (3 measurement points might be needed)
I have no idea where to start... I don't know anything to about electronics and microcomputer...
Can you please point me in the right direction, like a guide, a shoppinglist? $100-200 will it cover it?
I have found this:
https://www.sparkfun.com/tutorials/389
Could I connect 3 Sensors?
Could I connect wifi-adapter?
Could I make it a web-server?
Thank in advance,
Johan
Those flexforce sensors are useless for the accuracy and range you specified.
There are a number of scales available with a serial data output. Start with one of those, then add an Arduino for the wireless and website stuff. A Rasberry Pi would possibly be better.
You should learn to crawl first. Buy an Arduino Uno or similar and practice the basic electronics and programming. There is a lot of information under the Learning tab above.
Once you have the basics, add a little more. Work on one device at a time then combine into previous successes.
We are here to assist but you have to do some work like learning the basics.
Many of these things you want are not "basics" and will require a higher level of ability.
Weedpharma
these force sensors have very bad linearity and stabilty.
10 kg with 100 grams is 1000 points so 10 bits, good to do with arduino, however the signal from these straingauges is only 10 mV so you will need some amplifier circuit.
the rest is done with a shield.